Hemi RT wrote:
One of the best features with tow mode is it stops the converter from locking up which allows the transmission to run cooler as it allows the trans to shift quicker if a lower gear is required.
I don't know but I always read that locking up the torque converter helps the trans run cooler. When the torque converter is unlocked there is more slippage hence more heat generated. Also the Tow Haul is more sensitive to the need to shift and well shift down quicker to keep the engine in a higher RPM where the HP and torque is greater.
At least that it the way I have understood it all the years of driving Ford pickups with the Tow/Haul mode.